Thank you for the new information. No, I definitely have not cracked the code for that last remaining branch of my family. Do you and/or your mother live in the Marquette area right now? If so, I have an aunt who may be interested in more detailed face-to-face sharing.
Thank you for the clarification on Alexander. The only source I had was the census records and I hadn't encountered a woman by that name before.
Any help you can provide would be greatly appreciated by my family. I can also share more of what I have assembled so far.